CN215592706U - A high-efficient desulphurization unit for leather waste water treatment - Google Patents
A high-efficient desulphurization unit for leather waste water treatment Download PDFInfo
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- CN215592706U CN215592706U CN202121178621.0U CN202121178621U CN215592706U CN 215592706 U CN215592706 U CN 215592706U CN 202121178621 U CN202121178621 U CN 202121178621U CN 215592706 U CN215592706 U CN 215592706U
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Abstract
The utility model discloses a high-efficiency desulfurization device for leather wastewater treatment, which comprises a desulfurization tower (1), a wastewater inlet (2), an air inlet (3), a sulfur discharge pump (4), a waste gas outlet (5) and a wastewater outlet (6); the desulfurization tower (1) is internally provided with a wastewater spray head (7), a catalytic oxidation filler (8), an aeration disc (9), an elemental sulfur settling tank (10) and a micro-channel defoaming plate (11); the leather wastewater high-efficiency desulfurization device has the advantages of simple structure, low cost, high desulfurization efficiency, small investment and quick effect.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to an oxidation device for efficiently removing ammonia nitrogen.
Background
Waste water S containing a large amount of sodium sulfide is generated in the leather production process2-High pollution load (S)2-Concentration is more than or equal to 500mg/L), high toxicity and higher pH value (pH value is 11-13). If the pretreatment is not carried out, not only the subsequent treatment process cannot be carried out, but also the health and even the life of field operators are threatened.
CN111547957A discloses a biological desulfurization device and method for leather unhairing wastewater, relates to the technical field of wastewater treatment, and aims to solve the technical problems of high cost, much solid waste, hydrogen sulfide generation and sludge inactivation existing in the leather unhairing wastewater treatment method in the prior art, and the technical scheme of the utility model is as follows: comprises a hydrolysis acidification tank, a biological oxidation tank, a sedimentation tank and a water collecting tank; the hydrolysis acidification tank is provided with a wastewater inlet and a first exhaust port, and a mechanical stirring device is arranged inside the hydrolysis acidification tank; the biological oxidation tank is provided with a second exhaust port, and an aeration device is arranged in the biological oxidation tank; the sedimentation tank is provided with a sludge outlet; the water collecting tank is provided with a water outlet; the hydrolysis acidification tank, the biological oxidation tank, the sedimentation tank and the water collecting tank are sequentially connected through water holes.
CN110902957A provides a method for realizing synchronous desulfurization and denitrification of leather wastewater by using a sulfur autotrophic denitrification process, which comprises the following steps: treating the leather wastewater by a regulating tank, a hydrolysis acidification tank, a primary anaerobic tank, a primary aerobic tank, a secondary anaerobic tank and a secondary aerobic tank to obtain treated wastewater; adding polymeric ferric sulfate and polyacrylamide into the regulating tank; adding a desulfurization microbial inoculum into the primary aerobic tank; degreasing bacteria are added into the secondary aerobic tank; the pH value in the first-stage anaerobic tank is 7.0-8.0, the temperature is 25-40 ℃, and the dissolved oxygen is 0.1-0.8 mg/L. In the utility model, a medicament is added into a regulating tank; a large amount of sulfur ions are generated by hydrolysis and acidification, and then sulfur autotrophic denitrification is carried out in a first-level A pool; heterotrophic denitrification is carried out in the second-stage A pool, then two-stage aerobic treatment is adopted to realize complete nitrification, and synchronous desulfurization and denitrification of the leather wastewater are realized by adding a desulfurization microbial inoculum and a degreasing microbial inoculum; but also improves the stability of the system, the load of biochemical treatment and the impact resistance.
CN102503039A a leather waste water pollution-free treatment method, relates to the technical field of sewage treatment, and is characterized in that: the method comprises the following steps of firstly, primarily desulfurizing and filtering sulfur-containing wastewater and comprehensive wastewater, then, feeding the sulfur-containing wastewater and the comprehensive wastewater into an adjusting pre-aeration tank, then, precipitating the sulfur-containing wastewater in a primary sedimentation tank to remove part of sludge, chemically treating the rest wastewater in a vapor flotation tank, then, feeding the wastewater into a facultative tank to an aeration oxidation tank to perform aeration treatment twice, feeding supernatant into a secondary sedimentation tank to precipitate, feeding the supernatant into a water circulation pipeline, feeding the sludge into a sludge concentration tank, performing filter pressing on the sludge into blocks by a plate and frame filter press, and performing centralized collection treatment. The utility model can treat the sulfur-containing wastewater and other comprehensive wastewater in leather production completely, greatly reduce the content of impurities in the sewage, reduce the influence of the sewage on a subsequent production system, and ensure that the treated water can reach the standard of reutilization.
The process route of the above patent and the prior art treatment is long, the cost is high, and how to remove the sulfur in the leather wastewater quickly and efficiently is a concern of researchers.
Disclosure of Invention
Aiming at the prior art and the actual requirements, the utility model provides a high-efficiency desulfurization device for leather wastewater treatment.
The utility model relates to a high-efficiency desulfurization device for leather wastewater treatment, which comprises a desulfurization tower, a wastewater inlet, an air inlet, a sulfur discharge pump, a waste gas outlet and a wastewater outlet, wherein the desulfurization tower is connected with the wastewater inlet;
the method is characterized in that: the desulfurizing tower is provided with a waste water spray head, a catalytic oxidation filler, an aeration disc and an elemental sulfur settling tank; the waste water spray head is arranged at the upper part of the desulfurization tower and is connected with the water inlet, waste water is sprayed onto the micro-channel defoaming plate arranged at the middle part of the desulfurization tower through the waste water spray head, and the micro-channel defoaming plate is positioned on the catalytic oxidation filler; the aeration disc is connected with the air inlet, is arranged below the catalytic oxidation filler, and blows air into the catalytic oxidation filler to contact with the wastewater; the elemental sulfur settling tank is positioned at the bottom of the desulfurizing tower and is connected with a sulfur discharge pump through a pipeline, and the sulfur discharge pump discharges the elemental sulfur settled in the elemental sulfur settling tank out of the desulfurizing tower; the waste gas that produces in the processing procedure discharges through the waste gas outlet that sets up at jar body top, handles complete waste water and passes through waste water outlet discharge desulphurization unit.
The micro-channel defoaming plate is provided with 50-100 micro-pores, and the inner diameter of the widest part is 25-200 mu m. The whole micropore is in one of a heart shape, a circle shape and an oval shape, and the preferred micropore is a heart shape. The upper edge of the hole is provided with a crescent-shaped protrusion structure, the included angle between the crescent-shaped protrusion structure and the plane of the tower plate is 30-90 degrees, and the thickness of the micro-channel defoaming plate is 15-25cm;
the waste gas outlet is connected with a waste gas treatment system through a pipeline.
The aeration disc is a tubular aerator or a lifting aerator or a membrane aerator.
In the device, the catalytic oxidation filler can catalyze sodium sulfide to perform oxidation reaction with oxygen to generate elemental sulfur, and the elemental sulfur is settled in the elemental sulfur settling tank and then discharged by a sulfur discharge pump.
The utility model has the beneficial effects that:
1. the efficient desulfurization device for leather wastewater treatment adopts the principle that sulfur negative ions in sodium sulfide and oxygen in air are subjected to redox reaction under the action of catalytic oxidation filler to generate a sulfur simple substance, and the sulfur simple substance is removed after sedimentation.
2. The device of the utility model adopts a mode of aeration of the bottom air aeration disc, which not only provides sufficient oxygen environment for wastewater oxidation and increases the removal efficiency of sulfur ions, but also can prevent the generated sulfur simple substance from depositing on the catalytic oxidation filler by aeration, thereby ensuring the service life of the catalytic material and reducing the failure rate of the device.
3. The high-efficiency desulfurization device for leather wastewater treatment is suitable for leather wastewater with high sulfur content, and has the advantages of simple structure, low cost, high sulfur removal efficiency, small investment and quick response.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. desulfurizing tower, 2, waste water inlet, 3, air intlet, 4, sulphur removal pump, 5, exhaust outlet, 6, waste water export, 7, waste water shower nozzle, 8, catalytic oxidation filler, 9, aeration dish, 10, elementary substance sulphur settling tank, 11, microchannel defoaming board.
FIG. 2 is a schematic structural diagram of a microchannel defoaming plate according to the present invention:
12. and (4) micro-pores.
FIG. 3 is a schematic view of the structure of a microwell:
13. a hole; 14. crescent-shaped protrusion structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the overall structure of the present invention is schematically illustrated. As shown in the figure, the utility model relates to a high-efficiency desulfurization device for leather wastewater treatment.
Example 1
A high-efficiency desulfurization device for leather wastewater treatment comprises a desulfurization tower 1, a wastewater inlet 2, an air inlet 3, a sulfur discharge pump 4, a waste gas outlet 5 and a wastewater outlet 6; the desulfurization tower 1 is internally provided with a wastewater spray head 7, a catalytic oxidation filler 8, an aeration disc 9 and an elemental sulfur settling tank 10; the waste water spray nozzle 7 is arranged at the upper part of the desulfurizing tower 1 and is connected with the water inlet, waste water is sprayed onto a micro-channel defoaming plate 11 arranged at the middle part of the desulfurizing tower through the waste water spray nozzle 7, and the micro-channel defoaming plate is positioned on the catalytic oxidation filler; the aeration disc 9 is connected with an air inlet, is arranged below the catalytic oxidation filler 8, and blows air into the catalytic oxidation filler 8 to contact with the wastewater; the elemental sulfur settling tank 10 is positioned at the bottom of the desulfurizing tower 1 and is connected with the sulfur discharge pump 4 through a pipeline, and the sulfur discharge pump 4 discharges the elemental sulfur settled in the elemental sulfur settling tank 10 out of the desulfurizing tower 1; the waste gas that produces in the processing procedure is discharged through setting up the waste gas export 5 at jar body top, handles complete waste water and discharges desulphurization unit through waste water export 6.
The micro-channel defoaming plate is provided with 100 micro-pores, and the inner diameter of the widest part is 25 mu m. The whole hole is heart-shaped, and crescent-shaped protruding structures are arranged on the upper edge of the hole and form an included angle of 30 degrees with the plane of the tower plate.
The thickness of the micro-channel defoaming plate is 15 cm.
Waste S of examples2-The concentration is 820mg/L, the pH value is 11, and after wastewater enters through the water inlet, the wastewater spray head sprays the wastewater onto the catalytic oxidation filler arranged in the middle of the desulfurization tower; the aeration disc is connected with the air inlet, is arranged below the catalytic oxidation filler, and blows air into the catalytic oxidation filler to contact with the wastewater; the retention time is 1.5h, and the sulfur pump discharges the sulfur elementary substance settled in the elementary substance sulfur settling tank out of the desulfurizing tower; the waste gas that produces in the processing procedure discharges through the waste gas outlet that sets up at jar body top, handles complete waste water and passes through waste water outlet discharge desulphurization unit.
The high-efficiency desulfurization device for leather wastewater treatment is a CADS type high-efficiency desulfurization device developed by the inventor.
Example apparatus effluent S2-The concentration was 43 mg/L.
Example 2
The micro-channel defoaming plate is provided with 50 micro-pores, and the inner diameter of the widest part is 200 mu m. The whole hole is heart-shaped, the upper edge of the hole is provided with a crescent-shaped protruding structure, and the included angle between the crescent-shaped protruding structure and the plane of the tower plate is 60 degrees.
The thickness of the micro-channel defoaming plate is 19 cm.
Otherwise, the same as example 1;
example apparatus effluent S2-The concentration was 52 mg/L.
Example 3
The high-efficiency desulfurization device for leather wastewater treatment can be a high-efficiency desulfurization reactor CADS.
The micro-channel defoaming plate is provided with 60 micro-pores, and the inner diameter of the widest part is 200 mu m. The hole is oval as a whole. The upper edge of the hole is provided with a crescent-shaped protruding structure, and the included angle between the crescent-shaped protruding structure and the plane of the tower plate is 90 degrees.
The thickness of the micro-channel defoaming plate is 25 cm.
Otherwise, the same as example 1;
example apparatus effluent S2-The concentration was 65 mg/L.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.
Claims (7)
1. A high-efficiency desulfurization device for leather wastewater treatment comprises a desulfurization tower (1), a wastewater inlet (2), an air inlet (3), a sulfur discharge pump (4), a waste gas outlet (5) and a wastewater outlet (6); the method is characterized in that: the desulfurization tower (1) is internally provided with a wastewater spray head (7), a catalytic oxidation filler (8), an aeration disc (9), an elemental sulfur settling tank (10) and a micro-channel defoaming plate (11); the waste water spray head (7) is arranged at the upper part of the desulfurizing tower (1) and is connected with the water inlet, waste water is sprayed onto a micro-channel defoaming plate (11) arranged at the middle part of the desulfurizing tower (1) through the waste water spray head (7), and the micro-channel defoaming plate (11) is positioned on the catalytic oxidation filler (8); the aeration disc (9) is connected with an air inlet, is arranged below the catalytic oxidation filler (8), and blows air into the catalytic oxidation filler (8) to contact with wastewater; the elemental sulfur settling tank (10) is positioned at the bottom of the desulfurizing tower (1) and is connected with the sulfur discharge pump (4) through a pipeline, and the sulfur discharge pump (4) discharges the elemental sulfur settled in the elemental sulfur settling tank (10) out of the desulfurizing tower (1); waste gas generated in the treatment process is discharged through a waste gas outlet (5) arranged at the top of the tank body, and the completely treated waste water is discharged out of the desulfurization device through a waste water outlet (6).
2. The high-efficiency desulfurization apparatus for leather wastewater treatment according to claim 1, characterized in that: the waste gas outlet (5) is connected with a waste gas treatment system through a pipeline.
3. The high-efficiency desulfurization apparatus for leather wastewater treatment according to claim 1, characterized in that: the aeration disc (9) is a tubular aerator or a lifting aerator or a membrane aerator.
4. The high-efficiency desulfurization apparatus for leather wastewater treatment according to claim 1, characterized in that: the waste water spray head (7) is a shower spray head or a water curtain spray head.
5. The high-efficiency desulfurization apparatus for leather wastewater treatment according to claim 1, characterized in that: the micro-channel defoaming plate is provided with 50-100 micropores, the inner diameter of the widest part is 25-200 mu m, and the whole micropore is one of heart-shaped, circular and oval.
6. The high-efficiency desulfurization apparatus for leather wastewater treatment according to claim 5, characterized in that: the whole micropore is heart-shaped, a crescent-shaped protruding structure is arranged on the upper edge of the micropore, and the included angle between the micropore and the plane of the tower plate is 30-90 degrees.
7. The high-efficiency desulfurization apparatus for leather wastewater treatment according to claim 1, characterized in that: the thickness of the micro-channel defoaming plate is 15-25 cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121178621.0U CN215592706U (en) | 2021-05-29 | 2021-05-29 | A high-efficient desulphurization unit for leather waste water treatment |
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| CN202121178621.0U CN215592706U (en) | 2021-05-29 | 2021-05-29 | A high-efficient desulphurization unit for leather waste water treatment |
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